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Question
The gametophyte is not an independent, free-living generation in:
The gametophyte is not an independent, free-living generation in:
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Solution
The correct option is D Pinus
Adiantum is a fern (pteridophyte) which has an independent free-living gametophyte. Marchantia and Polytrichumis are bryophytes which have a dominant and free living gametophyte. Both the pteridophytes and bryophytes exhibit a haplo-diplontic life cycle. On the other hand, Pinus is a conifer tree (gymnosperms) in which the sporophyte is the dominant form and the male and female gametophytes are small, highly reduced and are completely dependent on the sporophyte.
Adiantum is a fern (pteridophyte) which has an independent free-living gametophyte. Marchantia and Polytrichumis are bryophytes which have a dominant and free living gametophyte. Both the pteridophytes and bryophytes exhibit a haplo-diplontic life cycle. On the other hand, Pinus is a conifer tree (gymnosperms) in which the sporophyte is the dominant form and the male and female gametophytes are small, highly reduced and are completely dependent on the sporophyte.
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